Radiance would've made a Chaos at treasure island game, it would be based around UCN (Ultimate Custom Night)
This game would've had remade models of other characters

Hellbound pnm:

Spirits from Original revamp:

Jake from Original Revamp

Inkblots:

Corruptus:

Cabin face?

Lost ones characters:

Looks like there would've been a menu outside the custom night screen

The game was cancelled due to it being a very massive project and was very difficult to do. While you played the game there was a small chance of mother appearing and putting a random character during the night.

The game would've had a death minigame a recreation of imscared NBD

It was said ) most of games soundtrack was copyrighted sadly another reason for it being

(source: wiki)